This is an arithmetic progression with a first term of 1, a difference of 1, last term (and number of terms) 105.
→ sum = ½ × number_of_terms × (first_term + last_term)
= ½ × 105 × (1 + 105)
= ½ × 105 × 106
= 5565
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103 + 2 = 105
It is 2.
If 3x - 1 = 11 what is the value of x 2 + x?
3 and 2 over 7 = ( 3*7 + 2 )/ 7 = 23/7 7 and 1 over 15 = ( 7*15 + 1 ) / 15 = 106/15 The least common multiple of 7 and 15 is 105 So, 23/7 + 106/15 = 23*15 / 105 + 106*7 / 105 = 345 / 105 + 742 / 105 = 1087 / 105 = (1050 + 37 ) / 105 = 10 and 37 over 105
- If 3X - 1 = 11, what is the value of X^2 + X?